Wednesday, March 21, 2007
Lion + Tiger = Liger
Ligers and wholphins? What next?Crazy mixed-up animals … what do they tell us? They seem to defy man-made classification systems — but what about the created ‘kinds’ in Genesis?
by Don Batten
If we can cross-breed a zebra and a horse (to produce a ‘zorse’), a lion and a tiger (a liger or tigon), or a (false) killer whale and a dolphin (a wholphin), what does this tell us about the original kinds of animals that God created?
The Bible tells us in Genesis chapter 1 that God created plants to produce seed ‘after their kind’ (vv. 11, 12). God also created the animals to reproduce ‘after their kind’ (vv. 20, 24, 25). ‘After their/its kind’ is repeated ten times in Genesis 1, giving emphasis to the principle. And we take it for granted. When we plant a tomato seed, we don’t expect to see a geranium pop up out of the ground. Nor do we expect that our dog will give birth to kittens or that Aunt Betty, who is expecting, will bring home a chimpanzee baby from hospital! Our everyday experience confirms the truth of the Bible that things produce offspring true to their kind.
But what is a created ‘kind’? And what organisms today represent the kinds God created in the beginning? The creationist scientist, Carolus Linnaeus (1707–1778), the founder of the science of taxonomy,1 tried to determine the created kinds. He defined a ‘species’ as a group of organisms that could interbreed among themselves, but not with another group, akin to the Genesis concept. (See aside below.)
Finding the created kinds
From Genesis 1, the ability to produce offspring, i.e. to breed with one another, defines the original created kinds. Linnaeus recognised this, but named many species2 without any breeding experiments, on the basis of such things as flower characteristics. In his mature years he did extensive hybridization (cross-breeding) experiments and realised that his ‘species’ concept was too narrow for the species to be considered as created kinds; he thought that the genus perhaps corresponded better with the created kind.3,4
Even today, creationists are often misrepresented as believing that God created all the species we have today, just like they are today, in the beginning. This is called ‘fixity of species’. The Bible does not teach this. Nevertheless, university professors often show students that a new ‘species’ has arisen in ferment flies, for example, and then claim that this disproves the Genesis account of creation. Darwin made this very mistake when he studied the finches and tortoises on the Galapagos islands. (He also erred in assuming that creation implied that each organism was made where it is now found; but from the Bible it is clear that today’s land-dwelling vertebrates migrated to their present locations after the Flood.)
If two animals or two plants can hybridize (at least enough to produce a truly fertilized egg), then they must belong to (i.e. have descended from) the same original created kind. If the hybridizing species are from different genera in a family, it suggests that the whole family might have come from the one created kind. If the genera are in different families within an order, it suggests that maybe the whole order may have derived from the original created kind.
On the other hand, if two species will not hybridize, it does not necessarily prove that they are not originally from the same kind. We all know of couples who cannot have children, but this does not mean they are separate species!
In the case of three species, A, B and C, if A and B can each hybridize with C, then it suggests that all three are of the same created kind — whether or not A and B can hybridize with each other. Breeding barriers can arise through such things as mutations. For example, two forms of ferment flies (Drosophila) produced offspring that could not breed with the parent species.5 That is, they were a new biological ‘species’. This was due to a slight chromosomal rearrangement, not any new genetic information. The new ‘species’ was indistinguishable from the parents and obviously the same kind as the parents, since it came from them.
Ligers
The Created Cat Kind
Possible history of cats since Creation. Speciation (based on pre-existing created genetic information) probably occurred faster after the Flood due to greater environmental pressures, isolation due to migration of small populations, and many unoccupied ecological niches. A male African lion (Panthera leo) and a female tiger (Panthera tigris) can mate to produce a liger. The reverse cross produces a tigon. Such crossing does not normally happen in the wild because most lions live in Africa and most tigers live in Asia. Also, lions and tigers just don’t mix; they are enemies in the wild. However, the Institute of Greatly Endangered and Rare Species, Myrtle Beach, South Carolina (USA), raised a lion and a tigress together. Arthur, the lion, and Ayla, the tigress, became good friends and bred to produce Samson and Sudan, two huge male ligers. Samson stands 3.7 m (12 feet) tall on his hind legs, weighs 500 kg (1,100 lbs) and can run at 80 km/hr (50 mph).
Lions and tigers belong to the same genus, Panthera, along with the jaguar, leopard and snow leopard, in the subfamily Felinae. This subfamily also contains the genus Felis, which includes the mountain lion and numerous species of smaller cats, including the domestic cat. The cheetah, genus Acinonyx, belongs to a different subfamily.6 Thus the genera Panthera, Felis and Acinonyx may represent descendants of three original created cat kinds, or maybe two: Panthera-Felis and Acinonyx, or even one cat kind. The extinct sabre-tooth tiger may have been a different created kind (see diagram at right).
The Panthera cats lack a hyoid bone at the back of the tongue, compared to Felis. Acinonyx has the hyoid, but lacks the ability to retract its claws. So the differences between the cats could have arisen through loss of genetic information due to mutations (loss of the bone; loss of claw retraction). Note that this has nothing to do with molecules-to-man evolution, which requires the addition of new information, not loss of information (which is to be expected in a fallen world as things tend to ‘fall apart’).
The pictures were sent to me in an email and verified by www.snopes.com and/or www.truthorfiction.com
The text is from the Answers In Genesiswebsite (link up to the left).
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2 comments:
Sudan and Sampson also have cousins. One of them is Hercules, the largest cat in the world today. Who were Hercules's parents because one of them must have been a sibling of Arthur or Ayla or sudan and hercules cant be cousins. All I find is that there was an accidental mating of two large cats. A male lion and female tiger
i love ligers. they are so calm and friendly
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